[llvm] [flang-rt] Fix runtime error when opening the same file on multiple units. (PR #190743)

[Eugene Epshteyn via llvm-commits]

https://github.com/eugeneepshteyn requested changes to this pull request.

I'm going to mark this as "do not submit".

@kaviya2510 , in the future, before starting with the implementation please file a flang issue first, so it could be discussed and discussion preserved for posterity.

https://github.com/llvm/llvm-project/pull/190743